Ba's finish came just as Chelsea looked to be on the way out after Schurrle and Oscar were both denied by the woodwork - although the London side were helped by a crucial miss from the normally reliable Edinson Cavani minutes before the decisive goal.
LEGENDS - CAMEROON - Roger Milla - one of the first African players to be a major star
Milla returned to the 1994 FIFA World Cup at the age of 42, being the oldest player ever to appear in a World Cup. Cameroon were knocked out in the group stages; however, Milla scored a goal against Russia, setting a record as the oldest goalscorer in a World Cup tournament; a record he set in the previous World Cup edition.
LEGENDS - GHANA - Abedi holds the record for most appearances at the Nations Cup Finals
He was the captain of Ghana's national football team for six years (1992-1998) and was one of the first African football players to earn a top placing in FIFA World Player of the Year voting in 1991 and 1992.
Abedi Pele played for Ghana 73 times and is considered the greatest football player in his country's history, and among the best in Africa. Until 7 June 2013 when he was surpassed by Asamoah Gyan, he was the top goal scorer for Ghana with 33 goals.
LEGENDS - TOGO - Julien Kossi Denke - tributes are paid to Togo's first overseas player
Julien Kossi Denke, was Togo's first footballer to play overseas. The defender was more popularly known as Wazo and captained Togo at the Africa Cup of Nations finals in Ivory Coast in 1984. Later that year he signed for French second division club Chateauroux from Togolese side Aiglons de Lome.
NATIONAL TEAM - Nigeria - Lukman Haruna hopeful over World Cup prospects
Dynamo Kiev midfielder Lukman Haruna hopes he can still make Nigeria's World Cup squad. The 23-year old has not played for the Super Eagles since the last World Cup in South Africa.
Debutants The Gambia booked their place in the quarter-finals at the Africa Cup of Nations as Musa Barrow's goal gave them a famous 1:0 victory over Guinea.
Bologna forward Barrow collected a pass and slotted past Aly Keita from the centre of the box in the 71st minute.
Defender Ibrahima Conte had an equaliser ruled out for offside before The Gambia's Yusupha Njie was sent off.
Guinea struck the post in injury time before another shot was tipped onto the crossbar by Baboucarr Gaye.
It was a stunning save by Gaye to keep out the powerful strike by Jose Kante, which came immediately after Conte had rattled the left-hand upright from a narrow angle.
Even then, Guinea forward Morgan Guilavogui latched onto the rebound off the bar and had his follow-up attempt blocked by Pa Modou Jagne.
Kante headed over from the resulting corner and the Scorpions, the lowest-ranked side at the tournament, held on to win as Guinea centre-back Conte was also dismissed in injury time for a second booking.
The Gambia, who are 150th in the world, will now face Cameroon in the last eight on Saturday after the hosts saw off Comoros 2:1.